80717660

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1\times {\mathrm{331}}^1$

素因数の和:566

約数の個数: 48

約数和(自身を含む): 173184480

約数和(自身を除く): 92466820

約数列:

[1, 2, 4, 5, 10, 20, 89, 137, 178, 274, 331, 356, 445, 548, 662, 685, 890, 1324, 1370, 1655, 1780, 2740, 3310, 6620, 12193, 24386, 29459, 45347, 48772, 58918, 60965, 90694, 117836, 121930, 147295, 181388, 226735, 243860, 294590, 453470, 589180, 906940, 4035883, 8071766, 16143532, 20179415, 40358830, 80717660]

約数ペア:

[(1, 80717660), (2, 40358830), (4, 20179415), (5, 16143532), (10, 8071766), (20, 4035883), (89, 906940), (137, 589180), (178, 453470), (274, 294590), (331, 243860), (356, 226735), (445, 181388), (548, 147295), (662, 121930), (685, 117836), (890, 90694), (1324, 60965), (1370, 58918), (1655, 48772), (1780, 45347), (2740, 29459), (3310, 24386), (6620, 12193)]